"""
Copyright (c) 2022 Huawei Technologies Co.,Ltd.

openGauss is licensed under Mulan PSL v2.
You can use this software according to the terms and conditions of the Mulan PSL v2.
You may obtain a copy of Mulan PSL v2 at:

          http://license.coscl.org.cn/MulanPSL2

THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
See the Mulan PSL v2 for more details.
"""
"""
Case Type   : DMS分布式锁
Case Name   : 用户获取锁、解锁、锁冲突操作
Create At   : 2023/4/21
Owner       : opentestcase033
Description :
    1.创建用户
    2.开启事务a，重命名用户，不提交，事务b执行后回滚
    3.开启事务b，修改用户登录密码
    4.清理环境
Expect:
    1.设置成功
    2.执行成功，获取锁
    3.等锁释放，事务a回滚(解锁)，事务b执行成功
    4.成功
History     :
"""

import os
import time
import unittest

from testcase.utils.Logger import Logger
from testcase.utils.CommonSH import CommonSH
from testcase.utils.Constant import Constant
from testcase.utils.ComThread import ComThread


class DmsOck(unittest.TestCase):

    def setUp(self):
        self.log = Logger()
        self.log.info(f'-----{os.path.basename(__file__)} start-----')
        self.pri_sh = CommonSH('PrimaryDbUser')
        self.constant = Constant()
        self.u_name = 'u_dms_ock_0015'

    def test_dms_ock(self):
        text1 = '-----step1:创建用户;expect:成功-----'
        self.log.info(text1)
        create_user = f"drop user if exists {self.u_name};" \
                      f"create user {self.u_name} password 'test@123';"
        create_user_res = self.pri_sh.execut_db_sql(create_user)
        self.log.info(create_user_res)
        self.assertIn(self.constant.CREATE_ROLE_SUCCESS_MSG, create_user_res,
                      f"执行失败:{text1}")

        text2 = '-----step2:开启事务a，重命名用户，不提交，' \
                '事务b执行后回滚;expect:执行成功，获取锁-----'
        self.log.info(text2)
        sql1 = f"start transaction;" \
               f"alter user {self.u_name} " \
               f"rename to new_{self.u_name};" \
               f"select pg_sleep(3);" \
               f"rollback;"
        session1 = ComThread(self.pri_sh.execut_db_sql, args=(sql1,))
        session1.setDaemon(True)
        session1.start()
        time.sleep(1)

        text3 = '-----step3:开启事务b，修改用户密码;' \
                'expect:等锁释放，事务a回滚(解锁)后，事务b执行成功-----'
        self.log.info(text3)
        sql2 = f"""begin;
        alter user {self.u_name} identified by 'abcd@123' replace 'test@123';
        end;"""
        session2 = ComThread(self.pri_sh.execut_db_sql, args=(sql2,))
        session2.setDaemon(True)
        session2.start()
        session1.join(10)
        session2.join(10)
        result1 = session1.get_result()
        self.log.info(f'session1_results: {result1}')
        result2 = session2.get_result()
        self.log.info(f'session2_results: {result2}')
        self.assertIn(self.constant.START_TRANSACTION_SUCCESS_MSG,
                      result1, f"执行失败:{text2}")
        self.assertIn(self.constant.ALTER_ROLE_SUCCESS_MSG, result1,
                      f"执行失败:{text2}")
        self.assertIn(self.constant.ROLLBACK_MSG, result1, f"执行失败{text2}")
        self.assertIn('BEGIN', result2, f"执行失败:{text3}")
        self.assertIn(self.constant.ALTER_ROLE_SUCCESS_MSG, result2,
                      f"修改密码失败:{text3}")
        self.assertIn(self.constant.COMMIT_SUCCESS_MSG, result2,
                      f"提交事务失败: {text3}")

    def tearDown(self):
        text4 = '-----step4:清理环境 expect:成功-----'
        self.log.info(text4)
        drop_res = self.pri_sh.execut_db_sql(
            f"drop user if exists {self.u_name} cascade;"
            f"drop user if exists new_{self.u_name} cascade;")
        self.log.info(drop_res)
        self.assertEqual(drop_res.count(self.constant.DROP_ROLE_SUCCESS_MSG), 2,
                         f"删除用户失败:{text4}")
        self.log.info(f'-----{os.path.basename(__file__)} end-----')
